Please consider providing comments on this Blog to facilitate a wide-ranging & open discussion during this process.

Hope to see you Thursday! – Liz Callahan (Elizabeth.J.Callahan@state.ma.us)

MassDEP is rewriting portions of the Massachusetts Contingency Plan (MCP) with the goal of providing clearer rules for owners, operators, LSPs and other interested parties dealing with sites where volatilization of contaminants under or near a building has caused the intrusion of vapor-phase contaminants into a building’s indoor air or could result in vapor intrusion as the result of future development.

What has been your experience with completing an IRA? What are the circumstances in which it is not clear when an IRA Completion Statement can be filed?

Source Elimination/Control

How should we define “source elimination/control” to ensure that people are appropriately addressing the source and have a clear standard to meet? The current requirement is that a “source [of OHM] . . . which is resulting or is likely to result in an increase in concentrations . . . is eliminated or controlled.” 310 CMR 40.1003(5).

What options should MassDEP consider for creating a measurable standard for whether source has been controlled?

DRAFT Status of Material

Please be aware that -- unless stated otherwise -- the material posted on this blog is DRAFT, being made available ONLY as part of the regulation and policy development process to inform and direct discussion. Draft material is not final and is very likely to be significantly revised before it becomes final. Therefore, the draft material here cannot be quoted or cited as MassDEP policy/regulation at this time.

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